Heat pump system for vehicle

Abstract

The utility model relates to a heat pump system of a vehicle, which comprises a battery cooling liquid loop, a first heat pump, a second heat pump and a heat pump, the electrical component cooling liquid loop comprises an electrical component, a radiator and a second pump; an air conditioning device including a compressor, an internal condenser, a first expansion valve, a first heat exchanger, a first valve, a second heat exchanger, a second expansion valve, an evaporator, and a first refrigerant branch line; the first heat exchanger is connected to an electrical component cooling liquid loop through an electrical component cooling liquid pipeline; refrigerant flowing out of the first heat exchanger can selectively flow into the second heat exchanger or the first refrigerant branch line through operation of the first valve. Under the condition that parts are reduced, the heat pump function is achieved, and the operation mode of the heat pump system is changed according to the heat load of the vehicle.

Description

TECHNICAL FIELD

[0001] The utility model provides a new layout's vehicle's heat pump system, it can reduce the case of component, realize heat pump function and change heat pump system's operation mode according to the heat load of vehicle. BACKGROUND

[0002] The electric vehicle is provided with a heat pump system which can use the heat absorbed from the electrical components (e.g. motor) and air of the electric vehicle to heat the vehicle. The existing heat pump system absorbs the heat of the air through a circuit composed of a radiator, a liquid tank, an electric pump and a cooling liquid pipeline. In addition, the existing heat pump system also absorbs the heat of the electrical components through a circuit composed of a condenser, a liquid tank, an electric pump and a cooling liquid pipeline. Such heat pump system has more components and is relatively expensive. In addition, the existing heat pump system does not have an operation mode for winter vehicle charging, which greatly affects the user experience.

[0003] Therefore, it is necessary to provide a vehicle heat pump system which can realize heat pump function with reduced components and change the operation mode of the heat pump system according to the heat load of the vehicle.

[0004] The information disclosed in the background section of the utility model is only intended to enhance the understanding of the general background of the utility model, and should not be regarded as acknowledging or implying in any form that the information constitutes prior art known to those skilled in the art. SUMMARY

[0005] The utility model aims to provide a vehicle heat pump system which can solve the above problems existing in the prior art.

[0006] To achieve the above object, the utility model provides a kind of heat pump system of vehicle, comprising: battery cooling liquid circuit, electrical component cooling liquid circuit and air conditioning device, the battery cooling liquid circuit includes battery, heater and first pump connected by battery cooling liquid pipeline;The electrical component cooling liquid circuit includes electrical component, radiator and second pump connected by electrical component cooling liquid pipeline;The air conditioning device includes compressor, internal condenser, first expansion valve, first heat exchanger, first valve, second heat exchanger, second expansion valve and evaporator connected by refrigerant pipeline.The air conditioning device can further include: first refrigerant branch pipeline, the first end of the first refrigerant branch pipeline is connected to the refrigerant pipeline downstream of first heat exchanger via first valve, and the second end of the first refrigerant branch pipeline is connected to the refrigerant pipeline upstream of compressor.The first heat exchanger can be connected to the electrical component cooling liquid circuit via the electrical component cooling liquid pipeline.The first valve can be a three-way valve, and the refrigerant flowing out of the first heat exchanger can be selectively flowed into the second heat exchanger or the first refrigerant branch pipeline by the operation of the first valve.

[0007] The air conditioning device according to the utility model can further include: a second refrigerant branch pipeline, a third refrigerant branch pipeline, a fourth refrigerant branch pipeline, a fifth refrigerant branch pipeline, a sixth refrigerant branch pipeline and a third valve, the first end of the second refrigerant branch pipeline can be connected to the refrigerant pipeline downstream of the first valve, and the second end of the second refrigerant branch pipeline can be connected to the second valve; the first end of the third refrigerant branch pipeline can be connected to the second valve, and the second end of the third refrigerant branch pipeline can be connected to the refrigerant pipeline upstream of the evaporator; the first end of the fourth refrigerant branch pipeline can be connected to the refrigerant pipeline downstream of the first expansion valve, and the second end of the fourth refrigerant branch pipeline can be connected to the second valve; the first end of the fifth refrigerant branch pipeline can be connected to the refrigerant pipeline downstream of the second heat exchanger, and the second end of the fifth refrigerant branch pipeline can be connected to the refrigerant pipeline downstream of the evaporator; the first end of the sixth refrigerant branch pipeline can be connected to the fifth refrigerant branch pipeline, and the second end of the sixth refrigerant branch pipeline can be connected to the refrigerant pipeline upstream of the compressor; the third valve can be arranged in the fifth refrigerant branch pipeline downstream of the first end of the sixth refrigerant branch pipeline. The second valve can be a three-way valve, and the refrigerant flowing out of the internal condenser can be selectively flowed into the fourth refrigerant branch pipeline by the operation of the second valve. The third valve can be a stop valve, and a part of the fifth refrigerant branch pipeline downstream of the first end of the sixth refrigerant branch pipeline can be connected or disconnected by the operation of the third valve.

[0008] The heat pump system of the vehicle according to the utility model can further comprise: a battery cooler and a third expansion valve, the battery cooler can be arranged on the sixth refrigerant branch pipeline and connected to the battery cooling liquid circuit through a battery cooling liquid pipeline; the third expansion valve can be arranged on the sixth refrigerant branch pipeline upstream of the battery cooler.

[0009] The electrical component cooling liquid circuit according to the utility model can further comprise: a fourth valve and a cooling liquid bypass pipeline, the fourth valve can be arranged on the electrical component cooling liquid pipeline between the first heat exchanger and the radiator; a first end of the cooling liquid bypass pipeline can be connected to the fourth valve, and a second end of the cooling liquid bypass pipeline can be connected to the electrical component cooling liquid pipeline downstream of the radiator. The fourth valve can be a three-way valve, and the operation of the fourth valve enables the cooling liquid flowing out of the electrical component to selectively flow into the radiator or the cooling liquid bypass pipeline.

[0010] In the first mode, when the heat load is high, the heat pump system of the vehicle according to the utility model can enable the refrigerant flowing out of the internal condenser to flow into the first heat exchanger in a non-expanded state through the operation of the first expansion valve, the first valve and the second valve, and enable the refrigerant flowing out of the first heat exchanger to flow into the second heat exchanger; can enable the refrigerant flowing out of the second heat exchanger to flow into the evaporator in an expanded state through the operation of the second expansion valve, the third expansion valve and the third valve; can enable the cooling liquid flowing out of the electrical component to flow into the radiator through the operation of the fourth valve; can enable the cooling liquid to circulate in the battery cooling liquid circuit through the operation of the first pump; can enable the cooling liquid to circulate in the electrical component cooling liquid circuit through the operation of the second pump; and can enable the refrigerant to circulate in the air conditioning device through the operation of the compressor.

[0011] In the first mode, when the heat load is low, the heat pump system of the vehicle according to the utility model can enable the refrigerant flowing out of the internal condenser to flow into the refrigerant pipeline upstream of the second heat exchanger through the fourth refrigerant branch pipeline and the second refrigerant branch pipeline in a non-expanded state through the operation of the first expansion valve, the first valve and the second valve; can enable the refrigerant flowing out of the second heat exchanger to flow into the evaporator in an expanded state through the operation of the second expansion valve, the third expansion valve and the third valve; can enable the cooling liquid flowing out of the electrical component to flow into the radiator through the operation of the fourth valve; can enable the cooling liquid to circulate in the battery cooling liquid circuit through the operation of the first pump; can enable the cooling liquid to circulate in the electrical component cooling liquid circuit through the operation of the second pump; and can enable the refrigerant to circulate in the air conditioning device through the operation of the compressor.

[0012] According to the heat pump system of the vehicle of the utility model, when the heat load is high in the second mode, the refrigerant flowing out from the internal condenser can flow into the first heat exchanger in the non-expanded state through the operation of the first expansion valve, the first valve and the second valve, and the refrigerant flowing out from the first heat exchanger flows into the second heat exchanger; the refrigerant flowing out from the second heat exchanger can flow into the battery cooler in the expanded state through the operation of the second expansion valve, the third expansion valve and the third valve; the cooling liquid flowing out from the electrical component can flow into the radiator through the operation of the fourth valve; the cooling liquid can be circulated in the battery cooling liquid circuit through the operation of the first pump; the cooling liquid can be circulated in the electrical component cooling liquid circuit through the operation of the second pump; and the refrigerant can be circulated in the air conditioning device through the operation of the compressor.

[0013] According to the heat pump system of the vehicle of the utility model, when the heat load is low in the second mode, the refrigerant flowing out from the internal condenser can flow into the refrigerant pipeline upstream of the second heat exchanger through the fourth refrigerant branch pipeline and the second refrigerant branch pipeline in the non-expanded state through the operation of the first expansion valve, the first valve and the second valve; the refrigerant flowing out from the second heat exchanger can flow into the battery cooler in the expanded state through the sixth refrigerant branch pipeline through the operation of the second expansion valve, the third expansion valve and the third valve; the cooling liquid flowing out from the electrical component can flow into the radiator through the operation of the fourth valve; the cooling liquid can be circulated in the battery cooling liquid circuit through the operation of the first pump; the cooling liquid can be circulated in the electrical component cooling liquid circuit through the operation of the second pump; and the refrigerant can be circulated in the air conditioning device through the operation of the compressor.

[0014] According to the heat pump system of the vehicle of the utility model, when the heat load is high in the third mode, the refrigerant flowing out from the internal condenser can flow into the first heat exchanger in the non-expanded state through the operation of the first expansion valve, the first valve and the second valve, and the refrigerant flowing out from the first heat exchanger flows into the second heat exchanger; a part of the refrigerant flowing out from the second heat exchanger can flow into the battery cooler in the expanded state through the sixth refrigerant branch pipeline through the operation of the second expansion valve, the third expansion valve and the third valve, and the remaining part of the refrigerant flowing out from the second heat exchanger flows into the evaporator in the expanded state; the cooling liquid flowing out from the electrical component can flow into the radiator through the operation of the fourth valve; the cooling liquid can be circulated in the battery cooling liquid circuit through the operation of the first pump; the cooling liquid can be circulated in the electrical component cooling liquid circuit through the operation of the second pump; and the refrigerant can be circulated in the air conditioning device through the operation of the compressor.

[0015] According to the vehicle heat pump system of the utility model, when the heat load is low in the third mode, the refrigerant flowing out from the internal condenser can flow into the refrigerant pipeline upstream of the second heat exchanger in the non-expanded state through the fourth refrigerant branch pipeline and the second refrigerant branch pipeline by the operation of the first expansion valve, the first valve and the second valve; a part of the refrigerant flowing out from the second heat exchanger can flow into the battery cooler in the expanded state through the sixth refrigerant branch pipeline by the operation of the second expansion valve, the third expansion valve and the third valve, and the remaining part of the refrigerant flowing out from the second heat exchanger can flow into the evaporator in the expanded state; the cooling liquid flowing out from the electrical component can flow into the radiator by the operation of the fourth valve; the cooling liquid can be circulated in the battery cooling liquid circuit by the operation of the first pump; the cooling liquid can be circulated in the electrical component cooling liquid circuit by the operation of the second pump; and the refrigerant can be circulated in the air conditioning device by the operation of the compressor.

[0016] According to the vehicle heat pump system of the utility model, when the heat load is low in the third mode, the refrigerant flowing out from the internal condenser can flow into the refrigerant pipeline upstream of the second heat exchanger in the non-expanded state through the fourth refrigerant branch pipeline and the second refrigerant branch pipeline by the operation of the first expansion valve, the first valve and the second valve; a part of the refrigerant flowing out from the second heat exchanger can flow into the battery cooler in the expanded state through the sixth refrigerant branch pipeline by the operation of the second expansion valve, the third expansion valve and the third valve, and the remaining part of the refrigerant flowing out from the second heat exchanger can flow into the evaporator in the expanded state; the cooling liquid flowing out from the electrical component can flow into the radiator by the operation of the fourth valve; the cooling liquid can be circulated in the battery cooling liquid circuit by the operation of the first pump; the cooling liquid can be circulated in the electrical component cooling liquid circuit by the operation of the second pump; and the refrigerant can be circulated in the air conditioning device by the operation of the compressor.

[0017] According to the vehicle heat pump system of the utility model, when the heat load is low in the third mode, the refrigerant flowing out from the internal condenser can flow into the refrigerant pipeline upstream of the second heat exchanger in the non-expanded state through the fourth refrigerant branch pipeline and the second refrigerant branch pipeline by the operation of the first expansion valve, the first valve and the second valve; a part of the refrigerant flowing out from the second heat exchanger can flow into the battery cooler in the expanded state through the sixth refrigerant branch pipeline by the operation of the second expansion valve, the third expansion valve and the third valve, and the remaining part of the refrigerant flowing out from the second heat exchanger can flow into the evaporator in the expanded state; the cooling liquid flowing out from the electrical component can flow into the radiator by the operation of the fourth valve; the cooling liquid can be circulated in the battery cooling liquid circuit by the operation of the first pump; the cooling liquid can be circulated in the electrical component cooling liquid circuit by the operation of the second pump; and the refrigerant can be circulated in the air conditioning device by the operation of the compressor.

[0018] According to the vehicle heat pump system of the utility model, when the vehicle is running and the environment temperature is high, a part of refrigerant flowing out from the internal condenser can flow into the first heat exchanger in an expanded state through the operation of the first expansion valve, the first valve and the second valve, and the refrigerant flowing out from the first heat exchanger flows into the first refrigerant branch pipeline, and the remaining part of the refrigerant flowing out from the internal condenser flows into the refrigerant pipeline upstream of the second heat exchanger via the fourth refrigerant branch pipeline and the second refrigerant branch pipeline in an expanded state; the refrigerant flowing out from the first heat exchanger can all flow into the fifth refrigerant branch pipeline and flow into the refrigerant pipeline upstream of the compressor via the fifth refrigerant branch pipeline through the operation of the second expansion valve, the third expansion valve and the third valve; the cooling liquid flowing out from the electrical component can flow into the cooling liquid bypass pipeline through the operation of the fourth valve; the cooling liquid can be circulated in the battery cooling liquid circuit through the operation of the first pump; the cooling liquid can be circulated in the electrical component cooling liquid circuit through the operation of the second pump; and the refrigerant can be circulated in the air conditioning device through the operation of the compressor.

[0019] According to the vehicle heat pump system of the utility model, when the vehicle is running and the environment temperature is low, a part of refrigerant flowing out from the internal condenser can flow into the first heat exchanger in an expanded state through the operation of the first expansion valve, the first valve and the second valve, and the refrigerant flowing out from the first heat exchanger flows into the first refrigerant branch pipeline, and the remaining part of the refrigerant flowing out from the internal condenser flows into the refrigerant pipeline upstream of the evaporator via the fourth refrigerant branch pipeline and the third refrigerant branch pipeline in an expanded state; the cooling liquid flowing out from the electrical component can flow into the cooling liquid bypass pipeline through the operation of the fourth valve; the cooling liquid can be circulated in the battery cooling liquid circuit through the operation of the first pump; the cooling liquid can be circulated in the electrical component cooling liquid circuit through the operation of the second pump; and the refrigerant can be circulated in the air conditioning device through the operation of the compressor.

[0020] According to the vehicle heat pump system of the utility model, when the vehicle idles and the ambient temperature is high in the fifth mode, a part of refrigerant flowing out from the internal condenser can flow into the first heat exchanger in an expanded state through the operation of the first expansion valve, the first valve and the second valve, and the refrigerant flowing out from the first heat exchanger flows into the second heat exchanger, and the remaining part of the refrigerant flowing out from the internal condenser flows into the refrigerant pipeline upstream of the evaporator via the fourth refrigerant branch pipeline and the third refrigerant branch pipeline in an expanded state; the refrigerant flowing out from the second heat exchanger can all flow into the fifth refrigerant branch pipeline and flow into the refrigerant pipeline upstream of the compressor via the fifth refrigerant branch pipeline through the operation of the second expansion valve, the third expansion valve and the third valve; the cooling liquid flowing out from the electrical component can flow into the cooling liquid bypass pipeline through the operation of the fourth valve; the cooling liquid can be circulated in the battery cooling liquid circuit through the operation of the first pump; the cooling liquid can be circulated in the electrical component cooling liquid circuit through the operation of the second pump; and the refrigerant can be circulated in the air conditioning device through the operation of the compressor.

[0021] According to the vehicle heat pump system of the utility model, when the vehicle idles and the ambient temperature is high in the fifth mode, a part of refrigerant flowing out from the internal condenser can flow into the first heat exchanger in an expanded state through the operation of the first expansion valve, the first valve and the second valve, and the refrigerant flowing out from the first heat exchanger flows into the second heat exchanger, and the remaining part of the refrigerant flowing out from the internal condenser flows into the refrigerant pipeline upstream of the evaporator via the fourth refrigerant branch pipeline and the third refrigerant branch pipeline in an expanded state; the refrigerant flowing out from the second heat exchanger can all flow into the fifth refrigerant branch pipeline and flow into the refrigerant pipeline upstream of the compressor via the fifth refrigerant branch pipeline through the operation of the second expansion valve, the third expansion valve and the third valve; the cooling liquid flowing out from the electrical component can flow into the cooling liquid bypass pipeline through the operation of the fourth valve; the cooling liquid can be circulated in the battery cooling liquid circuit through the operation of the first pump; the cooling liquid can be circulated in the electrical component cooling liquid circuit through the operation of the second pump; and the refrigerant can be circulated in the air conditioning device through the operation of the compressor.

[0022] The utility model discloses take above technical scheme, it has following beneficial effect:

[0023] The vehicle heat pump system of the utility model can utilize two heat exchangers to increase the condensation amount of refrigerant when the thermal load of the vehicle is high, thereby improving the cooling effect of in-vehicle cooling and battery cooling.

[0024] The vehicle heat pump system of the utility model can ensure the cooling effect of the battery by the battery cooler and the refrigerant of the air conditioning device.

[0025] The heat pump system of the vehicle according to the present application can recover waste heat of electrical components and / or absorb heat of external air for heating in the vehicle, thereby reducing the use of electric heaters and improving the drivable distance of the electric vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0026] The above and other objects, features and other advantages of the present application will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:

[0027] Figure 1 to show a schematic diagram of a heat pump system of a vehicle according to an exemplary embodiment of the present application;

[0028] Figure 2 to show a schematic diagram of a heat pump system of a vehicle according to an exemplary embodiment of the present application when the heat load is high in a first mode;

[0029] Figure 3 to show a schematic diagram of a heat pump system of a vehicle according to an exemplary embodiment of the present application when the heat load is low in a first mode;

[0030] Figure 4 to show a schematic diagram of a heat pump system of a vehicle according to an exemplary embodiment of the present application when the heat load is high in a second mode;

[0031] Figure 5 to show a schematic diagram of a heat pump system of a vehicle according to an exemplary embodiment of the present application when the heat load is low in a second mode;

[0032] Figure 6 to show a schematic diagram of a heat pump system of a vehicle according to an exemplary embodiment of the present application when the heat load is high in a third mode;

[0033] Figure 7 to show a schematic diagram of a heat pump system of a vehicle according to an exemplary embodiment of the present application when the heat load is low in a third mode;

[0034] Figure 8 to show a schematic diagram of a heat pump system of a vehicle according to an exemplary embodiment of the present application when the vehicle is running and the ambient temperature is low in a fourth mode;

[0035] Figure 9 to show a schematic diagram of a heat pump system of a vehicle according to an exemplary embodiment of the present application when the vehicle is idling and the ambient temperature is high in a fourth mode;

[0036] Figure 10 to show a schematic diagram of a heat pump system of a vehicle according to an exemplary embodiment of the present application when the vehicle is running and the ambient temperature is high in a fourth mode;

[0037] Figure 11 FIG. 5 is a schematic diagram illustrating a heat pump system of a vehicle according to an exemplary embodiment of the present application in a fifth mode when the vehicle is running and the ambient temperature is low;

[0038] Figure 12 FIG. 6 is a schematic diagram illustrating a heat pump system of a vehicle according to an exemplary embodiment of the present application in a fifth mode when the vehicle is idling and the ambient temperature is high;

[0039] Figure 13 FIG. 7 is a schematic diagram illustrating a heat pump system of a vehicle according to an exemplary embodiment of the present application in a sixth mode.

[0040] It is to be understood that the figures are not drawn to scale and that they show, in a slightly simplified manner, various features illustrating the basic principles of the present application. In the drawings of the present application, like reference numerals indicate like or equivalent parts throughout the several views of the drawings. DETAILED DESCRIPTION

[0041] Reference will now be made in detail to various embodiments of the present application, examples of which are illustrated in the accompanying drawings and described below. While the present application will be described in conjunction with the exemplary embodiments, it will be understood that the present application is not limited to those exemplary embodiments. On the contrary, the present application is intended to cover various alternatives, modifications, equivalents and other embodiments, including those pertaining to the spirit and scope of the present application as defined by the appended claims.

[0042] Hereinafter, a heat pump system of a vehicle according to various exemplary embodiments of the present application will be described more specifically with reference to the accompanying drawings.

[0043] Figure 1 FIG. 1 is a schematic diagram illustrating a heat pump system of a vehicle according to an exemplary embodiment of the present application.

[0044] As shown in FIG. 1, a heat pump system of a vehicle according to an exemplary embodiment of the present application can include a battery coolant circuit 10, an electrical component coolant circuit 20, and an air conditioning device 30. Figure 1

[0045] In the exemplary embodiment, the battery coolant circuit 10 can include a battery 12, a heater 13, and a first pump 14 connected by a battery coolant line 11. In addition, the battery coolant circuit 10 can further include a reservoir 15.

[0046] ​The battery 12 can be a high-voltage battery that serves as a power source of an electric vehicle. The heater 13 can be an electric heater, such as a PTC heater, for heating the coolant in the battery coolant line 11. When the battery 12 needs to be heated, the heater 13 can be operated to heat the battery 12. The first pump 14 can be an electric pump for circulating the coolant in the battery coolant circuit 10. The coolant reservoir 15 can be used to store and replenish the coolant in the battery coolant circuit 10.

[0047] The electrical component coolant circuit 20 can include an electrical component 22, a radiator 23, and a second pump 24 connected by an electrical component coolant line 21. In addition, the electrical component coolant circuit 20 can further include a coolant reservoir 25.

[0048] The electrical component 22 can be a component that consumes power in an electric vehicle, such as a motor. The coolant, which has increased in temperature as it flows through the electrical component 22, can flow into the radiator 23 and exchange heat with outside air in the radiator 23 to cool the coolant. When the electrical component 22 needs to be cooled, the electrical component 22 can be cooled using the radiator. The second pump 24 can be an electric pump for circulating the coolant in the electrical component coolant circuit 20. The coolant reservoir 25 can be used to store and replenish the coolant in the electrical component coolant circuit 20.

[0049] The air conditioning device 30 can include a compressor 32, an internal condenser 33, a first expansion valve EXV1, a first heat exchanger 34, a first valve V1, a second heat exchanger 35, a second expansion valve TXV, and an evaporator 36 connected by refrigerant lines 31. In addition, the air conditioning device 30 can further include a reservoir 37.

[0050] The compressor 32 can compress the refrigerant into a high-temperature and high-pressure state and circulate the refrigerant in the air conditioning device 30.

[0051] The internal condenser 33 can be disposed inside a Heating Ventilation and Air Conditioning (HVAC) module (not shown) of the air conditioning device 30 for heating air introduced into the vehicle interior.

[0052] The first expansion valve EXV1 can be an electronic expansion valve. The first expansion valve EXV1 can be disposed upstream of the first heat exchanger 34 to selectively flow the refrigerant into the first heat exchanger 34 in an expanded state or a non-expanded state.

[0053] The first heat exchanger 34 can be provided in the refrigerant line 31 downstream of the first expansion valve EXV1, and can be connected to the electric component coolant circuit 20 via the electric component coolant line 21 downstream of the electric component 22. The coolant flowing out of the electric component 22 can exchange heat with the refrigerant flowing out of the internal condenser 33 in the first heat exchanger 34. When the first expansion valve EXV1 causes the refrigerant to flow into the first heat exchanger 34 in a non-expanded state, the first heat exchanger 34 can function as a condenser, thereby condensing the refrigerant flowing into the first heat exchanger 34 using the coolant in the electric component coolant circuit 20. When the first expansion valve EXV1 causes the refrigerant to flow into the first heat exchanger 34 in an expanded state, the first heat exchanger 34 can function as an evaporator, thereby absorbing the heat of the coolant in the electric component coolant circuit 20 using the refrigerant flowing into the first heat exchanger 34. Accordingly, in the case where the first heat exchanger 34 functions as a condenser, the condensation amount of the refrigerant can be additionally increased, and in the case where the first heat exchanger 34 functions as an evaporator, the waste heat of the electric component 22 can be recovered.

[0054] The first valve V1 can be a three-way valve. The first valve V1 can be provided in the refrigerant line 31 between the first heat exchanger 34 and the second heat exchanger 35.

[0055] The second heat exchanger 35 can be provided at the front of the vehicle, and air introduced from the outside of the vehicle can exchange heat with the refrigerant in the refrigerant line 31 in the second heat exchanger 35. When the first expansion valve EXV1 causes the refrigerant to flow into the second heat exchanger 35 in a non-expanded state, the second heat exchanger 35 can function as a condenser, thereby condensing the refrigerant flowing into the second heat exchanger 35 using the introduced outside air. When the first expansion valve EXV1 causes the refrigerant to flow into the second heat exchanger 35 in an expanded state, the second heat exchanger 35 can function as an evaporator, thereby absorbing the heat of the introduced outside air using the refrigerant flowing into the second heat exchanger 35.

[0056] The second expansion valve TXV can be a mechanical expansion valve. The second expansion valve TXV can be provided upstream of the evaporator 36 to cause the refrigerant to flow into the evaporator 36 in an expanded state.

[0057] The evaporator 36 can be provided inside the HVAC module of the air conditioning device 30 to cool air introduced into the vehicle interior.

[0058] The accumulator 37 can be provided in the refrigerant line 31 upstream of the compressor 32 to separate the refrigerant into gaseous refrigerant and liquid refrigerant, and supply only the gaseous refrigerant to the compressor 32.

[0059] In an exemplary embodiment, the air conditioning apparatus 30 can further include: a first refrigerant branch line 41, a second refrigerant branch line 42, a third refrigerant branch line 43, a fourth refrigerant branch line 44, a fifth refrigerant branch line 45, and a sixth refrigerant branch line 46.

[0060] A first end of the first refrigerant branch line 41 can be connected to the refrigerant line 31 downstream of the first heat exchanger 34 via the first valve V1, and a second end of the first refrigerant branch line 41 can be connected to the refrigerant line 31 upstream of the accumulator 37. By the operation of the first valve V1, the refrigerant flowing out of the first heat exchanger 34 can be caused to flow into the first refrigerant branch line 41, and not into the second heat exchanger 35.

[0061] A first end of the second refrigerant branch line 42 can be connected to the refrigerant line 31 downstream of the first valve V1, and a second end of the second refrigerant branch line 42 can be connected to the second valve V2.

[0062] A first end of the third refrigerant branch line 43 can be connected to the second valve V2, and a second end of the third refrigerant branch line 43 can be connected to the refrigerant line 31 between the second expansion valve TXV and the evaporator 36.

[0063] A first end of the fourth refrigerant branch line 44 can be connected to the refrigerant line 31 between the first expansion valve EXV1 and the first heat exchanger 34, and a second end of the fourth refrigerant branch line 44 can be connected to the second valve V2.

[0064] The second valve V2 can be a three-way valve, and by the operation of the second valve V2, the refrigerant flowing out of the first expansion valve EXV1 can be caused to flow into the fourth refrigerant branch line 44, and then into the second refrigerant branch line 42 or the third refrigerant branch line 43.

[0065] A first end of the fifth refrigerant branch line 45 can be connected to the refrigerant line 31 between the second heat exchanger 35 and the second expansion valve TXV, and a second end of the fifth refrigerant branch line 45 can be connected to the refrigerant line 31 between the evaporator 36 and the accumulator 37.

[0066] The sixth refrigerant branch line 46 can be branched from the fifth refrigerant branch line 45, a first end of the sixth refrigerant branch line 46 can be connected to the fifth refrigerant branch line 45, and a second end of the sixth refrigerant branch line 46 can be connected to the refrigerant line 31 between the evaporator 36 and the accumulator 37. Specifically, the second end of the sixth refrigerant branch line 46 can be connected to the refrigerant line 31 between the second end of the fifth refrigerant branch line 45 and the accumulator 37.

[0067] A third valve V3 can be provided on the fifth refrigerant branch line 45. The third valve V3 can be a shut-off valve provided on the fifth refrigerant branch line 45 between the first end of the sixth refrigerant branch line 46 and the second end of the fifth refrigerant branch line 45. The operation of the third valve V3 can enable or disable a portion of the fifth refrigerant branch line 45 downstream of the first end of the sixth refrigerant branch line 46.

[0068] Further, in the exemplary embodiment, the air conditioning device 30 can further include a door provided inside the HVAC module, and the air passing through the evaporator 36 can be selectively passed through the internal condenser 33 by adjusting the position of the door.

[0069] In the exemplary embodiment, the heat pump system of the vehicle according to the exemplary embodiment of the present application can further include a battery chiller 51 and a third expansion valve EXV2.

[0070] The battery chiller 51 can be provided on the sixth refrigerant branch line 46 and can be connected to the battery coolant circuit 10 via the battery coolant line 11 downstream of the battery 12. The coolant flowing out of the battery 12 can exchange heat with the refrigerant flowing out of the second heat exchanger 35 at the battery chiller 51.

[0071] The third expansion valve EXV2 can be an electronic expansion valve, and the third expansion valve EXV2 can be provided upstream of the battery chiller 51 to selectively flow the refrigerant into the battery chiller 51 in an expanded state or a non-expanded state. When the third expansion valve EXV2 flows the refrigerant into the battery chiller 51 in the expanded state, the refrigerant in the air conditioning device 30 can be used to cool the coolant flowing into the battery chiller 51. Thus, the battery 12 is cooled using the cooled coolant.

[0072] Further, in the exemplary embodiment, the electrical component coolant circuit 20 can further include a fourth valve V4 and a coolant bypass line 26.

[0073] The fourth valve V4 can be a three-way valve. The fourth valve V4 can be provided on the electrical component coolant line 21 between the first heat exchanger 34 and the radiator 23.

[0074] The coolant bypass line 26 can branch from the electrical component coolant line 21, a first end of the coolant bypass line 26 can be connected to the fourth valve V4, and a second end of the coolant bypass line 26 can be connected to the electrical component coolant line 21 between the radiator 23 and the electrical component 22. The coolant bypass line 26 can bypass the radiator 23 for the coolant flowing out of the electrical component 22.

[0075] When the waste heat of the electrical component 22 is recovered using the first heat exchanger 34, the outflow of the coolant from the electrical component 22 can be made to flow into the coolant bypass line 26, rather than into the radiator 23, by operation of the fourth valve V4.

[0076] Further, the heat pump system of the vehicle according to the exemplary embodiment of the present application can further include a cooling fan 27 and an active damper (not shown). The cooling fan 27 can be provided at the rear of the second heat exchanger 35 and the radiator 23 to introduce external air for cooling the refrigerant in the second heat exchanger 35 and the coolant in the radiator 23. The active damper can be provided at the front of the vehicle to control the introduction of the external air.

[0077] In the exemplary embodiment, the first port of the first valve V1 can be connected to the refrigerant line 31 downstream of the first heat exchanger 34, the second port of the first valve V1 can be connected to the first end of the first refrigerant branch line 41, and the third port of the first valve V1 can be connected to the refrigerant line 31 upstream of the first end of the second refrigerant branch line 42.

[0078] The first port of the second valve V2 can be connected to the first end of the third refrigerant branch line 43, the second port of the second valve V2 can be connected to the second end of the fourth refrigerant branch line 44, and the third port of the second valve V2 can be connected to the second end of the second refrigerant branch line 42.

[0079] The first port of the fourth valve V4 can be connected to the electrical component coolant line 21 downstream of the first heat exchanger 34, the second port of the fourth valve V4 can be connected to the first end of the coolant bypass line 26, and the third port of the fourth valve V4 can be connected to the electrical component coolant line 21 upstream of the radiator 23.

[0080] Further, the heat pump system of the vehicle according to the exemplary embodiment of the present application can further include an ambient temperature sensor (not shown) for sensing an ambient temperature.

[0081] The operation mode of the heat pump system can be determined according to the setting of the air conditioning device 30, the temperature of the battery 12, the ambient temperature, the driving state of the vehicle, etc. In the exemplary embodiment, the operation mode of the heat pump system can include a first mode, a second mode, a third mode, a fourth mode, a fifth mode, and a sixth mode. Further, in the first mode to the third mode, the operation of the heat pump system can be differently controlled according to the thermal load of the vehicle. In the fourth mode and the fifth mode, the operation of the heat pump system can be differently controlled according to the driving state of the vehicle and the ambient temperature.

[0082] Figures 2 to 13 Schematic diagrams of the heat pump system of the vehicle in the first mode to the sixth mode are respectively shown. The following will be described in connection withFigures 2 to 13 The first to sixth modes of the heat pump system are described in detail.

[0083] Figure 2 A schematic diagram illustrating a heat pump system of a vehicle according to an exemplary embodiment of the present invention in a first mode when the heat load is high; Figure 3 This diagram illustrates a vehicle heat pump system according to an exemplary embodiment of the present invention in a first mode when the heat load is low. Here, high heat load refers to a situation where the pressure of the air conditioning unit 30 is relatively high, the air temperature inside the passenger compartment is relatively high, and cooling is required as quickly as possible. Low heat load refers to a situation where the pressure of the air conditioning unit 30 is relatively low, the air temperature inside the passenger compartment is relatively low, but cooling is still required.

[0084] Here, the first mode refers to the in-vehicle cooling mode of the air conditioning unit 30. For example... Figure 2 As shown, in the first mode, when the heat load is high, the first and third ports of the first valve V1 can be connected, and the second port can be closed. All three ports of the second valve V2 can be closed. The third valve V3 can be closed. The first and third ports of the fourth valve V4 can be connected, and the second port can be closed. The first expansion valve EXV1 allows refrigerant to flow without expansion. The second expansion valve TXV can open, allowing refrigerant to flow in an expanded state. The third expansion valve EXV2 can be closed.

[0085] By operating the first expansion valve EXV1, the first valve V1, and the second valve V2, a portion of the refrigerant line 31, which houses the first heat exchanger 34, can be connected, while the second refrigerant branch line 42, the third refrigerant branch line 43, and the fourth refrigerant branch line 44 can be shut off. The refrigerant flowing from the internal condenser 33 can then flow entirely into the first heat exchanger 34 in a non-expanded state. Thus, the refrigerant flowing from the compressor 32 can be condensed once using the coolant in the electrical component coolant circuit 20.

[0086] By operating the second expansion valve TXV, the third expansion valve EXV2, and the third valve V3, the fifth refrigerant branch line 45 and the sixth refrigerant branch line 46 can be shut off. The refrigerant flowing out of the second heat exchanger 35 can then flow entirely into the evaporator 36 in an expanded state. Thus, the evaporator 36 can be used to cool the air introduced into the vehicle.

[0087] By operating the fourth valve V4, the coolant bypass line 26 can be shut off. The coolant flowing from the electrical component 22 can then flow into the radiator 23. Thus, the radiator 23 can be used to dissipate heat from the electrical component 22.

[0088] In addition, the first pump 14 can operate, causing coolant to circulate in the battery coolant circuit 10. The second pump 24 can operate, causing coolant to circulate in the electrical component coolant circuit 20. The compressor 32 can operate, causing refrigerant to circulate in the air conditioning unit 30.

[0089] With the above configuration, the refrigerant discharged from the compressor 32 flows into the internal condenser 33. At this time, the door position is adjusted so that the air introduced into the vehicle does not pass through the internal condenser 33, thus the refrigerant passes through the internal condenser 33 without being condensed. The refrigerant flowing out of the internal condenser 33 flows into the first expansion valve EXV1 without being expanded by it. The non-expanded refrigerant flows into the first heat exchanger 34, where it is condensed once by the coolant in the electrical component coolant circuit 20. The refrigerant flowing out of the first heat exchanger 34 flows into the second heat exchanger 35, where it is condensed a second time by outside air to increase the amount of refrigerant condensed. The refrigerant flowing out of the second heat exchanger 35 flows into the second expansion valve TXV and is expanded by it. The expanded refrigerant flows into the evaporator 36. The refrigerant flowing out of the evaporator 36 returns to the compressor 32 via the receiver 37.

[0090] In addition, the coolant flowing out of the battery 12 flows sequentially through the heater 13, the battery cooler 51, the reservoir 15 and the first pump 14, and then returns to the battery 12.

[0091] In addition, the coolant flowing out of the electrical component 22 flows sequentially through the first heat exchanger 34, the fourth valve V4, the radiator 23, the reservoir 25, and the second pump 24, and then returns to the electrical component 22.

[0092] In the first mode, when the heat load is high, the refrigerant can be condensed twice using the first heat exchanger 34 and the second heat exchanger 35, thereby increasing the amount of refrigerant condensed. Therefore, the cooling effect of the vehicle interior and battery cooling can be improved. Furthermore, the radiator 23 can be used to cool the electrical components 22.

[0093] like Figure 3 As shown, in the first mode, when the heat load is low, all three ports of the first valve V1 can be closed. The second and third ports of the second valve V2 can be connected, while the first port can be closed. The third valve V3 can be closed. The first and third ports of the fourth valve V4 can be connected, while the second port can be closed. The first expansion valve EXV1 allows refrigerant to flow without expansion. The second expansion valve TXV can open, allowing refrigerant to flow in an expanded state. The third expansion valve EXV2 can be closed.

[0094] By operation of the first expansion valve EXV1, the first valve V1, and the second valve V2, the portion of the refrigerant line 31 provided with the first heat exchanger 34 can be shut off, the second refrigerant branch line 42 and the fourth refrigerant branch line 44 can be turned on, and the third refrigerant branch line 43 can be shut off. The refrigerant flowing out of the internal condenser 33 can flow in a non-expanded state, via the fourth refrigerant branch line 44 and the second refrigerant branch line 42, all the way into the refrigerant line 31 upstream of the second heat exchanger 35 (without passing through the first heat exchanger 34), and then into the second heat exchanger 35. Thus, the refrigerant flowing out of the compressor 32 can be condensed using outside air.

[0095] By operation of the second expansion valve TXV, the third expansion valve EXV2, and the third valve V3, the fifth refrigerant branch line 45 and the sixth refrigerant branch line 46 can be shut off. The refrigerant flowing out of the second heat exchanger 35 can flow in an expanded state all the way into the evaporator 36. Thus, the air introduced into the vehicle interior can be cooled using the evaporator 36.

[0096] By operation of the fourth valve V4, the coolant bypass line 26 can be shut off. The coolant flowing out of the electrical component 22 can flow into the radiator 23. Thus, the electrical component 22 can be cooled using the radiator 23.

[0097] Further, the first pump 14 can be operated so that the coolant circulates in the battery coolant circuit 10. The second pump 24 can be operated so that the coolant circulates in the electrical component coolant circuit 20. The compressor 32 can be operated so that the refrigerant circulates in the air-conditioning device 30.

[0098] By the above configuration, the refrigerant discharged from the compressor 32 flows into the internal condenser 33. At this time, the position of the door is adjusted so that the air introduced into the vehicle interior does not pass through the internal condenser 33, and thus the refrigerant passes through the internal condenser 33 without being condensed. The refrigerant flowing out of the internal condenser 33 flows into the first expansion valve EXV1 without being expanded by the first expansion valve EXV1. The refrigerant in a non-expanded state flows into the second heat exchanger 35 via the fourth refrigerant branch line 44, the second refrigerant branch line 42, and the refrigerant line 31, and in the second heat exchanger 35, the refrigerant is condensed using outside air. The refrigerant flowing out of the second heat exchanger 35 flows into the second expansion valve TXV and is expanded by the second expansion valve TXV. The refrigerant in an expanded state flows into the evaporator 36. The refrigerant flowing out of the evaporator 36 returns to the compressor 32 via the accumulator 37.

[0099] Further, the coolant flowing out of the battery 12 flows through the heater 13, the battery cooler 51, the reservoir 15, and the first pump 14 in this order, and then returns to the battery 12.

[0100] Further, the cooling liquid flowing out of the electrical component 22 flows through the first heat exchanger 34, the fourth valve V4, the radiator 23, the reservoir 25, and the second pump 24 in this order, and then returns to the electrical component 22.

[0101] In the first mode, when the thermal load is low, the refrigerant can be once condensed by only the second heat exchanger 35. Further, the electrical component 22 can be cooled by the radiator 23.

[0102] Here, the second mode refers to a battery cooling mode. As shown in FIG. 2, in the second mode, when the thermal load is high, the first port and the third port of the first valve V1 can be communicated, and the second port can be shut off. The three ports of the second valve V2 can all be shut off. The third valve V3 can be closed. The first port and the third port of the fourth valve V4 can be communicated, and the second port can be shut off. The first expansion valve EXV1 can pass the refrigerant therethrough without expansion. The second expansion valve TXV can be closed. The third expansion valve EXV2 can expand the refrigerant. Figure 4

[0103] By the operation of the first expansion valve EXV1, the first valve V1, and the second valve V2, a portion of the refrigerant line 31 provided with the first heat exchanger 34 can be communicated, and the second refrigerant branch line 42, the third refrigerant branch line 43, and the fourth refrigerant branch line 44 can be shut off. The refrigerant flowing out of the internal condenser 33 can all flow into the first heat exchanger 34 in a non-expanded state. Thus, the refrigerant flowing out of the compressor 32 can be once condensed by the cooling liquid in the electrical component cooling liquid circuit 20.

[0104] By the operation of the second expansion valve TXV, the third expansion valve EXV2, and the third valve V3, the sixth refrigerant branch line 46 and a portion of the fifth refrigerant branch line 45 (the portion refers to the fifth refrigerant branch line 45 between the first end of the fifth refrigerant branch line 45 and the first end of the sixth refrigerant branch line 46) can be communicated, and the remaining portion of the fifth refrigerant branch line 45 can be shut off. The refrigerant flowing out of the second heat exchanger 35 can all flow into the battery cooler 51 (without passing through the evaporator 36) in an expanded state. Thus, the battery 12 can be cooled by the refrigerant of the air conditioning device 30.

[0105] By the operation of the fourth valve V4, the cooling liquid bypass line 26 can be shut off. The cooling liquid flowing out of the electrical component 22 can flow into the radiator 23. Thus, the electrical component 22 can be radiated by the radiator 23.

[0106] ​Further, the first pump 14 can be operated so that the coolant circulates in the battery coolant circuit 10. The second pump 24 can be operated so that the coolant circulates in the electric component coolant circuit 20. The compressor 32 can be operated so that the refrigerant circulates in the air conditioning device 30.

[0107] By the above configuration, the refrigerant discharged from the compressor 32 flows into the internal condenser 33. At this time, the position of the door is adjusted so that the air introduced into the vehicle does not pass through the internal condenser 33, and thus the refrigerant passes through the internal condenser 33 without being condensed. The refrigerant flowing out of the internal condenser 33 flows into the first expansion valve EXV1 without being expanded by the first expansion valve EXV1. The refrigerant in the non-expanded state flows into the first heat exchanger 34, and in the first heat exchanger 34, the refrigerant is once condensed by the coolant in the electric component coolant circuit 20. The refrigerant flowing out of the first heat exchanger 34 flows into the second heat exchanger 35, and in the second heat exchanger 35, the refrigerant is twice condensed by the outside air to increase the condensation amount of the refrigerant. The refrigerant flowing out of the second heat exchanger 35 flows into the third expansion valve EXV2 via the fifth refrigerant branch line 45 and the sixth refrigerant branch line 46, and is expanded by the third expansion valve EXV2. The refrigerant in the expanded state flows into the battery cooler 51. The refrigerant in the expanded state can exchange heat with the coolant in the battery coolant circuit 10 in the battery cooler 51 to cool the battery 12. The refrigerant flowing out of the battery cooler 51 returns to the compressor 32 via the reservoir 37.

[0108] Further, the coolant flowing out of the battery 12 flows through the heater 13, the battery cooler 51, the reservoir 15, and the first pump 14 in this order, and then returns to the battery 12. The coolant, the temperature of which is increased when flowing through the battery 12, can flow into the battery cooler 51 to which the refrigerant is supplied, be cooled by heat exchange with the refrigerant, and then cool the battery 12 with the cooled coolant.

[0109] Further, the coolant flowing out of the electric component 22 flows through the first heat exchanger 34, the fourth valve V4, the radiator 23, the reservoir 25, and the second pump 24 in this order, and then returns to the electric component 22.

[0110] In the second mode, when the heat load is high, the refrigerant can be twice condensed by the first heat exchanger 34 and the second heat exchanger 35, thereby increasing the condensation amount of the refrigerant. Further, the battery 12 can be cooled by the refrigerant in the air conditioning device 30. Further, the electric component 22 can be cooled by the radiator 23.

[0111] As Figure 5As shown, in the second mode, when the heat load is low, the three ports of the first valve V1 can all be shut off. The second port and the third port of the second valve V2 can be communicated, and the first port can be shut off. The third valve V3 can be closed. The first port and the third port of the fourth valve V4 can be communicated, and the second port can be shut off. The first expansion valve EXV1 can flow the refrigerant therethrough without expansion. The second expansion valve TXV can be closed. The third expansion valve EXV2 can expand the refrigerant.

[0112] By the operation of the first expansion valve EXV1, the first valve V1, and the second valve V2, a portion of the refrigerant line 31 provided with the first heat exchanger 34 can be shut off, the second refrigerant branch line 42 and the fourth refrigerant branch line 44 can be turned on, and the third refrigerant branch line 43 can be shut off. The refrigerant flowing out from the internal condenser 33 can flow into the refrigerant line 31 upstream of the second heat exchanger 35 in a non-expanded state via the fourth refrigerant branch line 44 and the second refrigerant branch line 42 without passing through the first heat exchanger 34, and then flow into the second heat exchanger 35. Thus, the refrigerant flowing out from the compressor 32 can be condensed using the outside air.

[0113] By the operation of the second expansion valve TXV, the third expansion valve EXV2, and the third valve V3, the sixth refrigerant branch line 46 and a portion of the fifth refrigerant branch line 45 (the portion refers to the fifth refrigerant branch line 45 between the first end of the fifth refrigerant branch line 45 and the first end of the sixth refrigerant branch line 46) can be turned on, and the remaining portion of the fifth refrigerant branch line 45 can be shut off. The refrigerant flowing out from the second heat exchanger 35 can flow into the battery cooler 51 in an expanded state without passing through the evaporator 36. Thus, the battery 12 can be cooled using the refrigerant of the air conditioning device 30.

[0114] By the operation of the fourth valve V4, the coolant bypass line 26 can be shut off. The coolant flowing out from the electrical component 22 can flow into the radiator 23. Thus, the electrical component 22 can be radiated using the radiator 23.

[0115] Further, the first pump 14 can be operated such that the coolant circulates in the battery coolant circuit 10. The second pump 24 can be operated such that the coolant circulates in the electrical component coolant circuit 20. The compressor 32 can be operated such that the refrigerant circulates in the air conditioning device 30.

[0116] With the above configuration, the refrigerant discharged from the compressor 32 flows into the internal condenser 33. At this time, the door position is adjusted so that the air introduced into the vehicle does not pass through the internal condenser 33, thus the refrigerant passes through the internal condenser 33 without being condensed. The refrigerant flowing out of the internal condenser 33 flows into the first expansion valve EXV1 without being expanded by the first expansion valve EXV1. The non-expanded refrigerant flows into the second heat exchanger 35 via the fourth refrigerant branch line 44, the second refrigerant branch line 42, and the refrigerant line 31, where it is condensed by outside air. The refrigerant flowing out of the second heat exchanger 35 flows into the third expansion valve EXV2 via the fifth refrigerant branch line 45 and the sixth refrigerant branch line 46, and is expanded by the third expansion valve EXV2. The expanded refrigerant flows into the battery cooler 51. The expanded refrigerant can exchange heat with the coolant in the battery coolant circuit 10 in the battery cooler 51 to cool the battery 12. The refrigerant flowing out of the battery cooler 51 returns to the compressor 32 via the receiver 37.

[0117] Furthermore, the coolant flowing out of the battery 12 flows sequentially through the heater 13, the battery cooler 51, the reservoir 15, and the first pump 14, before returning to the battery 12. The coolant, whose temperature rises as it flows through the battery 12, can flow into the battery cooler 51, which is supplied with refrigerant. Through heat exchange with the refrigerant, the coolant can be cooled, and then the cooled coolant is used to cool the battery 12.

[0118] In addition, the coolant flowing out of the electrical component 22 flows sequentially through the first heat exchanger 34, the fourth valve V4, the radiator 23, the reservoir 25, and the second pump 24, and then returns to the electrical component 22.

[0119] In the second mode, when the heat load is low, the refrigerant can be condensed only once using the second heat exchanger 35. Furthermore, the battery 12 can be cooled using the refrigerant in the air conditioning unit 30. Additionally, the electrical components 22 can be cooled using the radiator 23.

[0120] Here, the third mode refers to the mode of cooling the vehicle interior and the battery using the air conditioning unit 30. For example... Figure 6 As shown, in the third mode, when the heat load is high, the first and third ports of the first valve V1 can be connected, and the second port can be closed. All three ports of the second valve V2 can be closed. The third valve V3 can be closed. The first and third ports of the fourth valve V4 can be connected, and the second port can be closed. The first expansion valve EXV1 allows refrigerant to flow without expansion. The second expansion valve TXV can be opened, allowing refrigerant to flow in an expanded state. The third expansion valve EXV2 allows the refrigerant to expand.

[0121] By operation of the first expansion valve EXV1, the first valve V1, and the second valve V2, the portion of the refrigerant line 31 provided with the first heat exchanger 34 can be connected, and the second refrigerant branch line 42, the third refrigerant branch line 43, and the fourth refrigerant branch line 44 can be shut off. The refrigerant flowing out from the internal condenser 33 can flow into the first heat exchanger 34 in a non-expanded state. Thus, the refrigerant flowing out from the compressor 32 can be once condensed by the coolant in the electric component coolant circuit 20.

[0122] By operation of the second expansion valve TXV, the third expansion valve EXV2, and the third valve V3, the sixth refrigerant branch line 46 and a portion of the fifth refrigerant branch line 45 (the portion refers to the fifth refrigerant branch line 45 between the first end of the fifth refrigerant branch line 45 and the first end of the sixth refrigerant branch line 46) can be connected, and the remaining portion of the fifth refrigerant branch line 45 can be shut off. A portion of the refrigerant flowing out from the second heat exchanger 35 can flow into the battery cooler 51 in an expanded state, and the remaining portion of the refrigerant flowing out from the second heat exchanger 35 can flow into the evaporator 36 in an expanded state. Thus, the battery 12 can be cooled by the refrigerant of the air conditioning device 30. In addition, the air introduced into the vehicle interior can be cooled by the evaporator 36.

[0123] By operation of the fourth valve V4, the coolant bypass line 26 can be shut off. The coolant flowing out from the electric components 22 can flow into the radiator 23. Thus, the electric components 22 can be radiated by the radiator 23.

[0124] In addition, the first pump 14 can be operated so that the coolant circulates in the battery coolant circuit 10. The second pump 24 can be operated so that the coolant circulates in the electric component coolant circuit 20. The compressor 32 can be operated so that the refrigerant circulates in the air conditioning device 30.

[0125] By the above configuration, the refrigerant discharged from the compressor 32 flows into the internal condenser 33. At this time, the position of the door is adjusted so that the air introduced into the vehicle does not pass through the internal condenser 33, and thus the refrigerant passes through the internal condenser 33 without being condensed. The refrigerant flowing out of the internal condenser 33 flows into the first expansion valve EXVl without being expanded by the first expansion valve EXVl. The refrigerant in the non-expanded state flows into the first heat exchanger 34, in which the refrigerant is once condensed by the coolant in the electric component coolant circuit 20. The refrigerant flowing out of the first heat exchanger 34 flows into the second heat exchanger 35, in which the refrigerant is twice condensed by the outside air to increase the condensation amount of the refrigerant. A part of the refrigerant flowing out of the second heat exchanger 35 flows into the third expansion valve EXV2 via the fifth refrigerant branch line 45 and the sixth refrigerant branch line 46, and is expanded by the third expansion valve EXV2. The refrigerant in the expanded state flows into the battery cooler 51. The refrigerant in the expanded state can exchange heat with the coolant in the battery coolant circuit 10 in the battery cooler 51 to cool the battery 12. The refrigerant flowing out of the battery cooler 51 returns to the compressor 32 via the reservoir 37. In addition, the remaining part of the refrigerant flowing out of the second heat exchanger 35 flows into the second expansion valve TXV, and is expanded by the second expansion valve TXV. The refrigerant in the expanded state flows into the evaporator 36. The refrigerant flowing out of the evaporator 36 returns to the compressor 32 via the reservoir 37.

[0126] In addition, the coolant flowing out of the battery 12 flows through the heater 13, the battery cooler 51, the reservoir 15, and the first pump 14 in this order, and then returns to the battery 12. The coolant, the temperature of which is increased when flowing through the battery 12, can flow into the battery cooler 51 to which the refrigerant is supplied, be cooled by heat exchange with the refrigerant, and then cool the battery 12 using the cooled coolant.

[0127] In addition, the coolant flowing out of the electric component 22 flows through the first heat exchanger 34, the fourth valve V4, the radiator 23, the reservoir 25, and the second pump 24 in this order, and then returns to the electric component 22.

[0128] In the third mode, when the heat load is high, the refrigerant can be twice condensed by the first heat exchanger 34 and the second heat exchanger 35, thereby increasing the condensation amount of the refrigerant. Thus, the cooling effect of the in-vehicle cooling and the battery cooling can be improved. In addition, the battery 12 can be cooled using the refrigerant in the air conditioning device 30. In addition, the electric component 22 can be cooled using the radiator 23.

[0129] As Figure 7As shown, in the third mode, when the heat load is low, the three ports of the first valve V1 can all be shut off. The second port and the third port of the second valve V2 can be communicated, and the first port can be shut off. The third valve V3 can be closed. The first port and the third port of the fourth valve V4 can be communicated, and the second port can be shut off. The first expansion valve EXV1 can pass the refrigerant therethrough without expansion. The second expansion valve TXV can be opened to pass the refrigerant therethrough in an expanded state. The third expansion valve EXV2 can expand the refrigerant.

[0130] By the operation of the first expansion valve EXV1, the first valve V1, and the second valve V2, a portion of the refrigerant line 31 provided with the first heat exchanger 34 can be shut off, the second refrigerant branch line 42 and the fourth refrigerant branch line 44 can be turned on, and the third refrigerant branch line 43 can be shut off. The refrigerant flowing out from the internal condenser 33 can flow into the refrigerant line 31 upstream of the second heat exchanger 35 via the fourth refrigerant branch line 44 and the second refrigerant branch line 42 in a non-expanded state without passing through the first heat exchanger 34, and then flow into the second heat exchanger 35. Thus, the refrigerant flowing out from the compressor 32 can be condensed using the outside air.

[0131] By the operation of the second expansion valve TXV, the third expansion valve EXV2, and the third valve V3, the sixth refrigerant branch line 46 and a portion of the fifth refrigerant branch line 45 can be turned on, and the remaining portion of the fifth refrigerant branch line 45 can be shut off. A portion of the refrigerant flowing out from the second heat exchanger 35 can flow into the battery cooler 51 in an expanded state, and the remaining portion of the refrigerant flowing out from the second heat exchanger 35 can flow into the evaporator 36 in an expanded state. Thus, the battery 12 can be cooled using the refrigerant of the air conditioning device 30. In addition, the air introduced into the vehicle interior can be cooled using the evaporator 36.

[0132] By the operation of the fourth valve V4, the coolant bypass line 26 can be shut off. The coolant flowing out from the electrical components 22 can flow into the radiator 23. Thus, the electrical components 22 can be heat-dissipated using the radiator 23.

[0133] In addition, the first pump 14 can be operated so that the coolant circulates in the battery coolant circuit 10. The second pump 24 can be operated so that the coolant circulates in the electrical component coolant circuit 20. The compressor 32 can be operated so that the refrigerant circulates in the air conditioning device 30.

[0134] By the above configuration, the refrigerant discharged from the compressor 32 flows into the internal condenser 33. At this time, the position of the door is adjusted so that the air introduced into the vehicle does not pass through the internal condenser 33, and thus the refrigerant passes through the internal condenser 33 without being condensed. The refrigerant flowing out of the internal condenser 33 flows into the first expansion valve EXV1 without being expanded by the first expansion valve EXV1. The refrigerant in the non-expanded state flows into the second heat exchanger 35 via the fourth refrigerant branch line 44, the second refrigerant branch line 42, and the refrigerant line 31, and is condensed by the use of the outside air in the second heat exchanger 35. A part of the refrigerant flowing out of the second heat exchanger 35 flows into the third expansion valve EXV2 via the fifth refrigerant branch line 45 and the sixth refrigerant branch line 46, and is expanded by the third expansion valve EXV2. The refrigerant in the expanded state flows into the battery cooler 51. The refrigerant in the expanded state can exchange heat with the coolant in the battery coolant circuit 10 in the battery cooler 51 to cool the battery 12. The refrigerant flowing out of the battery cooler 51 returns to the compressor 32 via the reservoir 37. In addition, the remaining part of the refrigerant flowing out of the second heat exchanger 35 flows into the second expansion valve TXV, and is expanded by the second expansion valve TXV. The refrigerant in the expanded state flows into the evaporator 36. The refrigerant flowing out of the evaporator 36 returns to the compressor 32 via the reservoir 37.

[0135] In addition, the coolant flowing out of the battery 12 flows through the heater 13, the battery cooler 51, the reservoir 15, and the first pump 14 in this order, and then returns to the battery 12. The coolant, the temperature of which is increased when flowing through the battery 12, can flow into the battery cooler 51 to which the refrigerant is supplied, be cooled by heat exchange with the refrigerant, and then cool the battery 12 by the use of the cooled coolant.

[0136] In addition, the coolant flowing out of the electrical components 22 flows through the first heat exchanger 34, the fourth valve V4, the radiator 23, the reservoir 25, and the second pump 24 in this order, and then returns to the electrical components 22.

[0137] In the third mode, when the heat load is low, the refrigerant can be once condensed by the use of only the second heat exchanger 35. In addition, the battery 12 can be cooled by the use of the refrigerant in the air conditioning device 30. In addition, the electrical components 22 can be cooled by the use of the radiator 23.

[0138] Here, the fourth mode refers to a heat pump mode. As described above, in the heat pump mode, the refrigerant is once condensed by the use of the second heat exchanger 35, and then expanded by the use of the third expansion valve EXV2. The refrigerant in the expanded state flows into the battery cooler 51 to cool the battery 12. In addition, the refrigerant in the expanded state flows into the first heat exchanger 34, and is condensed by the use of the coolant in the first heat exchanger 34. The refrigerant in the condensed state flows into the second heat exchanger 35, and is evaporated by the use of the outside air in the second heat exchanger 35. The refrigerant in the evaporated state flows into the compressor 32. Figure 8As shown, in the fourth mode, when the vehicle is running and the ambient temperature is low, the waste heat of the electrical components 22 can be recovered for in-vehicle heating using the first heat exchanger 34. In this case, the first port and the second port of the first valve V1 can be communicated, and the third port can be shut off. The three ports of the second valve V2 can all be shut off. The third valve V3 can be closed. The first port and the second port of the fourth valve V4 can be communicated, and the third port can be shut off. The first expansion valve EXV1 can expand the refrigerant. The second expansion valve TXV can be closed. The third expansion valve EXV2 can be closed.

[0139] By the operation of the first expansion valve EXV1, the first valve V1, and the second valve V2, the portion of the refrigerant line 31 provided with the first heat exchanger 34 can be connected, and the second refrigerant branch line 42, the third refrigerant branch line 43, and the fourth refrigerant branch line 44 can be shut off. The refrigerant flowing out from the internal condenser 33 can all flow into the first heat exchanger 34 in an expanded state. At this time, the first heat exchanger 34 can function as an evaporator, and thus the waste heat of the electrical components 22 can be recovered by heat exchange between the refrigerant and the coolant in the first heat exchanger 34.

[0140] By the operation of the fourth valve V4, the coolant bypass line 26 can be connected. The coolant flowing out from the electrical components 22 can bypass the radiator 23.

[0141] Further, the first pump 14 can be operated so that the coolant circulates in the battery coolant circuit 10. The second pump 24 can be operated so that the coolant circulates in the electrical component coolant circuit 20. The compressor 32 can be operated so that the refrigerant circulates in the air conditioning device 30.

[0142] By the above configuration, the refrigerant discharged from the compressor 32 flows into the internal condenser 33. At this time, the position of the door is adjusted so that the air introduced into the vehicle passes through the internal condenser 33, and thus the refrigerant is condensed by the internal condenser 33 while the air introduced into the vehicle is heated. The refrigerant flowing out from the internal condenser 33 flows into the first expansion valve EXV1 and is expanded by the first expansion valve EXV1. The refrigerant in an expanded state flows into the first heat exchanger 34, in which the heat of the coolant, which is raised in temperature as it passes through the electrical components 22, is absorbed by the refrigerant. The refrigerant flowing out from the first heat exchanger 34 flows into the reservoir 37 via the first refrigerant branch line 41 and the refrigerant line 31, and then returns to the compressor 32.

[0143] Further, the coolant flowing out from the battery 12 flows through the heater 13, the battery cooler 51, the reservoir 15, and the first pump 14 in this order, and then returns to the battery 12.

[0144] Further, the cooling liquid flowing out of the electric component 22 flows through the first heat exchanger 34, the fourth valve V4, the reservoir 25, and the second pump 24 in this order, and then returns to the electric component 22.

[0145] Further, the active shutter can be closed, and the cooling fan 27 can be stopped from operating, to reduce the wind resistance of the vehicle.

[0146] In the fourth mode, when the vehicle is running and the ambient temperature is low, the waste heat of the electric component 22 can be recovered using the first heat exchanger 34 for in-vehicle heating.

[0147] As shown in FIG. 4, in the fourth mode, when the vehicle is idling and the ambient temperature is high, the heat of the outside air can be absorbed using the second heat exchanger 35 for in-vehicle heating. In this case, the three ports of the first valve V1 can all be shut off. The second port and the third port of the second valve V2 can be connected, and the first port can be shut off. The third valve V3 can be open. The first port and the second port of the fourth valve V4 can be connected, and the third port can be shut off. The first expansion valve EXV1 can expand the refrigerant. The second expansion valve TXV can be closed. The third expansion valve EXV2 can be closed. Figure 9

[0148] By the operation of the first expansion valve EXV1, the first valve V1, and the second valve V2, a portion of the refrigerant line 31 provided with the first heat exchanger 34 can be shut off, the second refrigerant branch line 42 and the fourth refrigerant branch line 44 can be connected, and the third refrigerant branch line 43 can be shut off. The refrigerant flowing out of the interior condenser 33 can flow into the refrigerant line 31 upstream of the second heat exchanger 35 in an expanded state via the fourth refrigerant branch line 44 and the second refrigerant branch line 42 (without passing through the first heat exchanger 34), and then into the second heat exchanger 35. At this time, the second heat exchanger 35 can function as an evaporator, so that the heat of the outside air can be absorbed by heat exchange between the refrigerant and the outside air in the second heat exchanger 35.

[0149] By the operation of the second expansion valve TXV, the third expansion valve EXV2, and the third valve V3, the fifth refrigerant branch line 45 can be connected, the sixth refrigerant branch line 4 can be shut off, and a portion of the refrigerant line 31 provided with the second expansion valve TXV and the evaporator 36 can be shut off.

[0150] By the operation of the fourth valve V4, the cooling liquid bypass line 26 can be connected. The cooling liquid flowing out of the electric component 22 can bypass the radiator 23.

[0151] ​In addition, the first pump 14 can operate, causing coolant to circulate in the battery coolant circuit 10. The second pump 24 can operate, causing coolant to circulate in the electrical component coolant circuit 20. The compressor 32 can operate, causing refrigerant to circulate in the air conditioning unit 30.

[0152] With the above configuration, the refrigerant discharged from the compressor 32 flows into the internal condenser 33. At this time, the door position is adjusted so that the air introduced into the vehicle passes through the internal condenser 33, thereby condensing the refrigerant and heating the air introduced into the vehicle. The refrigerant flowing out of the internal condenser 33 flows into the first expansion valve EXV1 and is expanded by the first expansion valve EXV1. The expanded refrigerant flows into the second heat exchanger 35 via the fourth refrigerant branch line 44, the second refrigerant branch line 42, and the refrigerant line 31, where it absorbs heat from the outside air. The refrigerant flowing out of the second heat exchanger 35 flows into the receiver 37 via the fifth refrigerant branch line 45 and the refrigerant line 31, and then returns to the compressor 32.

[0153] In addition, the coolant flowing out of the battery 12 flows sequentially through the heater 13, the battery cooler 51, the reservoir 15 and the first pump 14, and then returns to the battery 12.

[0154] In addition, the coolant flowing out of the electrical component 22 flows sequentially through the first heat exchanger 34, the fourth valve V4, the reservoir 25 and the second pump 24, and then returns to the electrical component 22.

[0155] In the fourth mode, when the vehicle is idling and the ambient temperature is high, the second heat exchanger 35 can absorb heat from the outside air for heating the vehicle interior.

[0156] like Figure 10 As shown, in the fourth mode, when the vehicle is in motion and the ambient temperature is high, the first heat exchanger 34 can recover waste heat from the electrical components 22, and the second heat exchanger 35 can absorb heat from the outside air for use in heating the vehicle interior. In this mode, the first and second ports of the first valve V1 can be connected, and the third port can be closed. The second and third ports of the second valve V2 can be connected, and the first port can be closed. The third valve V3 can be opened. The first and second ports of the fourth valve V4 can be connected, and the third port can be closed. The first expansion valve EXV1 can expand the refrigerant. The second expansion valve TXV can be closed. The third expansion valve EXV2 can be closed.

[0157] By operation of the first expansion valve EXV1, the first valve V1, and the second valve V2, a portion of the refrigerant line 31 provided with the first heat exchanger 34 can be connected, the second refrigerant branch line 42 and the fourth refrigerant branch line 44 can be connected, and the third refrigerant branch line 43 can be shut off. A portion of the refrigerant flowing out of the internal condenser 33 can flow into the first heat exchanger 34 in an expanded state. At this time, the first heat exchanger 34 can function as an evaporator, and thus, waste heat of the electrical components 22 can be recovered by heat exchange between the refrigerant and the coolant in the first heat exchanger 34. At the same time, the remaining portion of the refrigerant flowing out of the internal condenser 33 can flow into the refrigerant line 31 upstream of the second heat exchanger 35 via the fourth refrigerant branch line 44 and the second refrigerant branch line 42, and then flow into the second heat exchanger 35 in an expanded state. At this time, the second heat exchanger 35 can function as an evaporator, and thus, heat of the outside air can be absorbed by heat exchange between the refrigerant and the outside air in the second heat exchanger 35.

[0158] By operation of the second expansion valve TXV, the third expansion valve EXV2, and the third valve V3, the fifth refrigerant branch line 45 can be connected, the sixth refrigerant branch line 4 can be shut off, and a portion of the refrigerant line 31 provided with the second expansion valve TXV and the evaporator 36 can be shut off.

[0159] By operation of the fourth valve V4, the coolant bypass line 26 can be connected. The coolant flowing out of the electrical components 22 can bypass the radiator 23.

[0160] Further, the first pump 14 can be operated so that the coolant circulates in the battery coolant circuit 10. The second pump 24 can be operated so that the coolant circulates in the electrical component coolant circuit 20. The compressor 32 can be operated so that the refrigerant circulates in the air conditioning device 30.

[0161] With the above configuration, the refrigerant discharged from the compressor 32 flows into the internal condenser 33. At this time, the door position is adjusted so that the air introduced into the vehicle passes through the internal condenser 33, thereby condensing the refrigerant and heating the air introduced into the vehicle. The refrigerant flowing out of the internal condenser 33 flows into the first expansion valve EXV1 and is expanded by the first expansion valve EXV1. A portion of the expanded refrigerant flows into the first heat exchanger 34, where it absorbs the heat from the coolant that has increased in temperature as it flows through the electrical components 22. The refrigerant flowing out of the first heat exchanger 34 flows into the receiver 37 via the first refrigerant branch line 41 and the refrigerant line 31, and then returns to the compressor 32. Meanwhile, the remaining expanded refrigerant flows into the second heat exchanger 35 via the fourth refrigerant branch line 44, the second refrigerant branch line 42, and the refrigerant line 31, where it absorbs the heat from the outside air. The refrigerant flowing out from the second heat exchanger 35 flows into the receiver 37 via the fifth refrigerant branch line 45 and the refrigerant line 31, and then returns to the compressor 32.

[0162] In addition, the coolant flowing out of the battery 12 flows sequentially through the heater 13, the battery cooler 51, the reservoir 15 and the first pump 14, and then returns to the battery 12.

[0163] In addition, the coolant flowing out of the electrical component 22 flows sequentially through the first heat exchanger 34, the fourth valve V4, the reservoir 25 and the second pump 24, and then returns to the electrical component 22.

[0164] In the fourth mode, when the vehicle is in motion and the ambient temperature is high, the first heat exchanger 34 can be used to recover the waste heat of the electrical components 22, and the second heat exchanger 35 can be used to absorb the heat of the outside air for use in heating the vehicle interior.

[0165] Here, the fifth mode refers to the heat pump and dehumidification mode. For example... Figure 11 As shown, in the fifth mode, when the vehicle is in motion and the ambient temperature is low, the waste heat from the electrical components 22 can be recovered using the first heat exchanger 34 for vehicle interior heating, and the evaporator 36 can be used for dehumidification of the vehicle interior. In this case, the first and second ports of the first valve V1 can be connected, and the third port can be closed. The first and second ports of the second valve V2 can be connected, and the third port can be closed. The third valve V3 can be closed. The first and second ports of the fourth valve V4 can be connected, and the third port can be closed. The first expansion valve EXV1 can expand the refrigerant. The second expansion valve TXV can be closed. The third expansion valve EXV2 can be closed.

[0166] By operation of the first expansion valve EXV1, the first valve V1, and the second valve V2, the portion of the refrigerant line 31 provided with the first heat exchanger 34 can be connected, the second refrigerant branch line 42 can be shut off, and the third refrigerant branch line 43 and the fourth refrigerant branch line 44 can be connected. A portion of the refrigerant flowing out of the internal condenser 33 can flow in an expanded state into the first heat exchanger 34. At this time, the first heat exchanger 34 can function as an evaporator, and thus, the waste heat of the electrical component 22 can be recovered by heat exchange between the refrigerant and the coolant in the first heat exchanger 34. Meanwhile, the remaining portion of the refrigerant flowing out of the internal condenser 33 can flow in an expanded state, via the fourth refrigerant branch line 44, the third refrigerant branch line 43, and the refrigerant line 31, into the evaporator 36.

[0167] By operation of the fourth valve V4, the coolant bypass line 26 can be connected. The coolant flowing out of the electrical component 22 can bypass the radiator 23.

[0168] Further, the first pump 14 can be operated so that the coolant circulates in the battery coolant circuit 10. The second pump 24 can be operated so that the coolant circulates in the electrical component coolant circuit 20. The compressor 32 can be operated so that the refrigerant circulates in the air conditioner 30.

[0169] By the above configuration, the refrigerant discharged from the compressor 32 flows into the internal condenser 33. At this time, the position of the door is adjusted so that the air introduced into the vehicle passes through the internal condenser 33, and thus, the refrigerant is condensed by the internal condenser 33 while the air introduced into the vehicle is heated. The refrigerant flowing out of the internal condenser 33 flows into the first expansion valve EXV1 and is expanded by the first expansion valve EXV1. A portion of the refrigerant in an expanded state flows into the first heat exchanger 34, in which the heat of the coolant, which is raised in temperature as it passes through the electrical component 22, is absorbed by the refrigerant. The refrigerant flowing out of the first heat exchanger 34 flows into the reservoir 37 via the first refrigerant branch line 41 and the refrigerant line 31, and then returns to the compressor 32. Meanwhile, the remaining portion of the refrigerant in an expanded state flows into the evaporator 36 to dehumidify the air introduced into the vehicle, and the refrigerant flowing out of the evaporator 36 passes through the reservoir 37 to return to the compressor 32.

[0170] Further, the coolant flowing out of the battery 12 sequentially flows through the heater 13, the battery cooler 51, the reservoir 15, and the first pump 14, and then returns to the battery 12.

[0171] Further, the coolant flowing out of the electrical component 22 sequentially flows through the first heat exchanger 34, the fourth valve V4, the reservoir 25, and the second pump 24, and then returns to the electrical component 22.

[0172] Further, the active shutter can be closed, and the cooling fan 27 can be stopped to reduce the wind resistance of the vehicle.

[0173] In the fifth mode, when the vehicle is running and the ambient temperature is low, the waste heat of the electrical components 22 can be recovered using the first heat exchanger 34 for in-vehicle heating, and the in-vehicle dehumidification can be performed using the evaporator 36.

[0174] As shown in FIG. 5, in the fifth mode, when the vehicle is idling and the ambient temperature is high, the waste heat of the electrical components 22 can be recovered using the first heat exchanger 34, and the heat of the outside air can be absorbed using the second heat exchanger 35 for in-vehicle heating. Further, the in-vehicle dehumidification can be performed using the evaporator 36. In this case, the first port and the third port of the first valve V1 can be connected, and the second port can be shut off. The first port and the second port of the second valve V2 can be connected, and the third port can be shut off. The third valve V3 can be opened. The first port and the second port of the fourth valve V4 can be connected, and the third port can be shut off. The first expansion valve EXV1 can expand the refrigerant. The second expansion valve TXV can be closed. The third expansion valve EXV2 can be closed. Figure 12 By the operation of the first expansion valve EXV1, the first valve V1, and the second valve V2, a portion of the refrigerant line 31 provided with the first heat exchanger 34 can be connected, the third refrigerant branch line 43 and the fourth refrigerant branch line 44 can be connected, and the second refrigerant branch line 42 can be shut off. A portion of the refrigerant flowing out from the internal condenser 33 can flow into the first heat exchanger 34 in an expanded state. At this time, the first heat exchanger 34 can function as an evaporator, and thus the waste heat of the electrical components 22 can be recovered by heat exchange between the refrigerant and the coolant in the first heat exchanger 34. Further, the refrigerant flowing out from the first heat exchanger 34 can flow into the second heat exchanger 35, and the second heat exchanger 35 can function as an evaporator, and thus the heat of the outside air can be absorbed by heat exchange between the refrigerant and the outside air in the second heat exchanger 35. At the same time, the remaining portion of the refrigerant flowing out from the internal condenser 33 can flow into the evaporator 36 in an expanded state via the fourth refrigerant branch line 44, the third refrigerant branch line 43, and the refrigerant line 31.

[0175] By the operation of the second expansion valve TXV, the third expansion valve EXV2, and the third valve V3, the fifth refrigerant branch line 45 can be connected, the sixth refrigerant branch line 4 can be shut off, and a portion of the refrigerant line 31 provided with the evaporator 36 can be connected.

[0176] By the operation of the fourth valve V4, the coolant bypass line 26 can be connected. The coolant flowing out from the electrical components 22 can bypass the radiator 23.

[0177] Further, the active shutter can be closed, and the cooling fan 27 can be stopped to reduce the wind resistance of the vehicle.

[0178] Further, the first pump 14 can be operated so that the coolant circulates in the battery coolant circuit 10. The second pump 24 can be operated so that the coolant circulates in the electric component coolant circuit 20. The compressor 32 can be operated so that the refrigerant circulates in the air conditioning device 30.

[0179] By the above configuration, the refrigerant discharged from the compressor 32 flows into the internal condenser 33. At this time, the position of the door is adjusted so that the air introduced into the vehicle passes through the internal condenser 33, whereby the refrigerant is condensed by the internal condenser 33 while the air introduced into the vehicle is heated. The refrigerant flowing out of the internal condenser 33 flows into the first expansion valve EXV1, and is expanded by the first expansion valve EXV1. A part of the refrigerant in the expanded state flows into the first heat exchanger 34, in which the heat of the coolant, which is raised in temperature as it passes through the electric component 22, is absorbed by the refrigerant. The refrigerant flowing out of the first heat exchanger 34 flows into the second heat exchanger 35, in which the heat of the outside air is absorbed by the refrigerant. The refrigerant flowing out of the second heat exchanger 35 flows into the reservoir 37 via the refrigerant line 31, the fifth refrigerant branch line 45, and the refrigerant line 31, and then returns to the compressor 32. At the same time, the remaining part of the refrigerant in the expanded state flows into the evaporator 36 to dehumidify the air introduced into the vehicle, and the refrigerant flowing out of the evaporator 36 passes through the reservoir 37 to return to the compressor 32.

[0180] Further, the coolant flowing out of the battery 12 flows through the heater 13, the battery cooler 51, the reservoir 15, and the first pump 14 in this order, and then returns to the battery 12.

[0181] Further, the coolant flowing out of the electric component 22 flows through the first heat exchanger 34, the fourth valve V4, the reservoir 25, and the second pump 24 in this order, and then returns to the electric component 22.

[0182] In the fifth mode, when the vehicle is idling and the ambient temperature is high, the waste heat of the electric component 22 can be recovered by the first heat exchanger 34, and the heat of the outside air can be absorbed by the second heat exchanger 35 for heating the vehicle interior. Further, the vehicle interior can be dehumidified by the evaporator 36.

[0183] Here, the sixth mode refers to a heat pump and battery cooling mode. As Figure 13As shown, in the sixth mode, the battery 12 is in a charging state, and the battery 12 generates heat during the charging of the battery 12, which decreases the charging speed. To ensure the charging speed of the battery 12, the battery 12 is cooled. In addition, the waste heat of the electric components 22 can be recovered by the first heat exchanger 34 for in-vehicle heating. In this case, the first port and the second port of the first valve V1 can be communicated, and the third port can be shut off. The second port and the third port of the second valve V2 can be communicated, and the first port can be shut off. The third valve V3 can be closed. The first port and the second port of the fourth valve V4 can be communicated, and the third port can be shut off. The first expansion valve EXV1 can expand the refrigerant.

[0184] The second expansion valve TXV can be closed. The third expansion valve EXV2 can pass the refrigerant without expansion.

[0185] By the operation of the first expansion valve EXV1, the first valve V1, and the second valve V2, a part of the refrigerant line 31 provided with the first heat exchanger 34 can be communicated, the second refrigerant branch line 42 and the fourth refrigerant branch line 44 can be communicated, and the third refrigerant branch line 43 can be shut off. A part of the refrigerant flowing out from the internal condenser 33 can flow into the first heat exchanger 34 in an expanded state. At this time, the first heat exchanger 34 can function as an evaporator, and thus the waste heat of the electric components 22 can be recovered by heat exchange between the refrigerant and the coolant in the first heat exchanger 34. At the same time, the remaining part of the refrigerant flowing out from the internal condenser 33 can flow into the second heat exchanger 35 via the fourth refrigerant branch line 44, the second refrigerant branch line 42, and the refrigerant line 31 in an expanded state.

[0186] The active damper can be closed, and the cooling fan 27 can be stopped from operating, and thus the refrigerant flowing into the second heat exchanger 35 does not exchange heat with the outside air.

[0187] By the operation of the second expansion valve TXV, the third expansion valve EXV2, and the third valve V3, the sixth refrigerant branch line 46 and a part of the fifth refrigerant branch line 45 can be communicated, and a part of the refrigerant line 31 provided with the second expansion valve TXV and the evaporator 36 can be shut off.

[0188] By the operation of the fourth valve V4, the coolant bypass line 26 can be communicated. The coolant flowing out from the electric components 22 can bypass the radiator 23.

[0189] In addition, the first pump 14 can be operated so that the coolant circulates in the battery coolant circuit 10. The second pump 24 can be operated so that the coolant circulates in the electric component coolant circuit 20. The compressor 32 can be operated so that the refrigerant circulates in the air conditioning device 30.

[0190] By the above configuration, the refrigerant discharged from the compressor 32 flows into the internal condenser 33. At this time, the position of the door is adjusted so that the air introduced into the vehicle passes through the internal condenser 33, so that the refrigerant is condensed by the internal condenser 33, and at the same time, the air introduced into the vehicle is heated. The refrigerant flowing out of the internal condenser 33 flows into the first expansion valve EXV1, and is expanded by the first expansion valve EXV1. Part of the refrigerant in the expanded state flows into the first heat exchanger 34, in which the heat of the refrigerant is used to absorb the heat of the cooling liquid whose temperature rises when flowing through the electrical components 22. The refrigerant flowing out of the first heat exchanger 34 flows into the reservoir 37 via the first refrigerant branch line 41 and the refrigerant line 31, and then returns to the compressor 32. At the same time, the remaining part of the refrigerant in the expanded state passes through the second heat exchanger 35 without heat exchange in the second heat exchanger 35. The refrigerant flowing out of the second heat exchanger 35 can flow into the battery cooler 51 in the expanded state via the refrigerant line 31, the fifth refrigerant branch line 45, and the sixth refrigerant branch line 46. The refrigerant in the expanded state can exchange heat with the cooling liquid in the battery cooling liquid circuit 10 in the battery cooler 51 to cool the battery 12. The refrigerant flowing out of the battery cooler 51 returns to the compressor 32 through the reservoir 37.

[0191] In addition, the cooling liquid flowing out of the battery 12 flows through the heater 13, the battery cooler 51, the reservoir 15, and the first pump 14 in sequence, and then returns to the battery 12.

[0192] In addition, the cooling liquid flowing out of the electrical components 22 flows through the first heat exchanger 34, the fourth valve V4, the reservoir 25, and the second pump 24 in sequence, and then returns to the electrical components 22.

[0193] In the sixth mode, when the battery 12 needs to be cooled during charging, the waste heat of the electrical components 22 can be recovered by the first heat exchanger 34 for vehicle heating, and the battery 12 can be cooled by the battery cooler 51.

[0194] The heat pump system of the vehicle according to the present application can use two heat exchangers to increase the condensation amount of the refrigerant when the thermal load of the vehicle is high, thereby improving the cooling effect of the vehicle cooling and the battery cooling.

[0195] The heat pump system of the vehicle according to the present application can ensure the cooling effect of the battery by the battery cooler and the refrigerant of the air conditioning device.

[0196] The heat pump system of the vehicle according to the present application can recover the waste heat of the electrical components and / or absorb the heat of the external air for vehicle heating, thereby reducing the use of the electric heater and improving the driving distance of the electric vehicle.

[0197] The foregoing description of the specific exemplary embodiments of the present application presented herein is not intended, nor is it to be construed, as being exhaustive or limiting of the present application. It will become apparent to those skilled in the art that various modifications and changes can be made to the exemplary embodiments presented without departing from the spirit and scope of the present application. It is intended that all such modifications and changes be considered as within the scope of the present application as defined by the appended claims and their equivalents.

Claims

1. A heat pump system of a vehicle, characterized by, Comprising: a battery coolant circuit including a battery, a heater, and a first pump connected by a battery coolant line; an electrical component coolant circuit including an electrical component, a radiator, and a second pump connected by an electrical component coolant line; and an air conditioning device including a compressor, an internal condenser, a first expansion valve, a first heat exchanger, a first valve, a second heat exchanger, a second expansion valve, and an evaporator connected by a refrigerant line; wherein the air conditioning device further comprises: a first refrigerant branch line having a first end connected to the refrigerant line downstream of the first heat exchanger via the first valve and a second end connected to the refrigerant line upstream of the compressor; the first heat exchanger is connected to the electrical component coolant circuit via the electrical component coolant line; the first valve is a three-way valve, and operation of the first valve enables refrigerant flowing out of the first heat exchanger to selectively flow into the second heat exchanger or the first refrigerant branch line. The air conditioning device further comprises:

2. The heat pump system of a vehicle according to claim 1, characterized by, a second refrigerant branch line having a first end connected to the refrigerant line downstream of the first valve and a second end connected to a second valve; a third refrigerant branch line having a first end connected to the second valve and a second end connected to the refrigerant line upstream of the evaporator; a fourth refrigerant branch line having a first end connected to the refrigerant line downstream of the first expansion valve and a second end connected to the second valve; a fifth refrigerant branch line having a first end connected to the refrigerant line downstream of the second heat exchanger and a second end connected to the refrigerant line downstream of the evaporator; a sixth refrigerant branch line having a first end connected to the fifth refrigerant branch line and a second end connected to the refrigerant line upstream of the compressor; and a third valve disposed in the fifth refrigerant branch line downstream of the first end of the sixth refrigerant branch line; wherein the second valve is a three-way valve, and operation of the second valve enables refrigerant flowing out of the internal condenser to selectively flow into the fourth refrigerant branch line; the third valve is a stop valve, and operation of the third valve enables a portion of the fifth refrigerant branch line downstream of the first end of the sixth refrigerant branch line to be connected or disconnected. Further comprising:

3. The heat pump system of a vehicle according to claim 2, characterized by, a battery cooler disposed in the sixth refrigerant branch line and connected to the battery coolant circuit via the battery coolant line; and a third expansion valve disposed in the sixth refrigerant branch line upstream of the battery cooler. The electrical component coolant circuit further comprises: a fourth valve disposed in the electrical component coolant line between the first heat exchanger and the radiator; and 4. The heat pump system of a vehicle according to claim 3, characterized by, a coolant bypass line having a first end connected to the fourth valve and a second end connected to the electrical component coolant line downstream of the radiator. ​ ​ The fourth valve is a three-way valve, and the operation of the fourth valve enables the cooling liquid flowing out from the electrical components to selectively flow into the radiator or the cooling liquid bypass line.

5. The heat pump system of a vehicle according to claim 4, characterized by, In the first mode when the heat load is high, by the operation of the first expansion valve, the first valve, and the second valve, the refrigerant flowing out from the internal condenser flows into the first heat exchanger in a non-expanded state, and the refrigerant flowing out from the first heat exchanger flows into the second heat exchanger; by the operation of the second expansion valve, the third expansion valve, and the third valve, the refrigerant flowing out from the second heat exchanger flows into the evaporator in an expanded state; by the operation of the fourth valve, the cooling liquid flowing out from the electrical components flows into the radiator; by the operation of the first pump, the cooling liquid is circulated in the battery cooling liquid circuit; by the operation of the second pump, the cooling liquid is circulated in the electrical component cooling liquid circuit; by the operation of the compressor, the refrigerant is circulated in the air conditioning device.

6. The heat pump system of a vehicle according to claim 4, characterized by, In the first mode when the heat load is low, by the operation of the first expansion valve, the first valve, and the second valve, the refrigerant flowing out from the internal condenser flows into the refrigerant pipeline upstream of the second heat exchanger in a non-expanded state via the fourth refrigerant branch pipeline and the second refrigerant branch pipeline; by the operation of the second expansion valve, the third expansion valve, and the third valve, the refrigerant flowing out from the second heat exchanger flows into the evaporator in an expanded state; by the operation of the fourth valve, the cooling liquid flowing out from the electrical components flows into the radiator; by the operation of the first pump, the cooling liquid is circulated in the battery cooling liquid circuit; by the operation of the second pump, the cooling liquid is circulated in the electrical component cooling liquid circuit; by the operation of the compressor, the refrigerant is circulated in the air conditioning device.

7. The heat pump system of a vehicle according to claim 4, characterized by, In the second mode when the heat load is high, by the operation of the first expansion valve, the first valve, and the second valve, the refrigerant flowing out from the internal condenser flows into the first heat exchanger in a non-expanded state, and the refrigerant flowing out from the first heat exchanger flows into the second heat exchanger; by the operation of the second expansion valve, the third expansion valve, and the third valve, the refrigerant flowing out from the second heat exchanger flows into the battery cooler in an expanded state via the sixth refrigerant branch pipeline; by the operation of the fourth valve, the cooling liquid flowing out from the electrical components flows into the radiator; by the operation of the first pump, the cooling liquid is circulated in the battery cooling liquid circuit; by the operation of the second pump, the cooling liquid is circulated in the electrical component cooling liquid circuit; by the operation of the compressor, the refrigerant is circulated in the air conditioning device.

8. The heat pump system of a vehicle according to claim 4, characterized by, In the second mode when the heat load is low, by the operation of the first expansion valve, the first valve, and the second valve, the refrigerant flowing out from the internal condenser flows into the refrigerant pipeline upstream of the second heat exchanger in a non-expanded state via the fourth refrigerant branch pipeline and the second refrigerant branch pipeline; by the operation of the second expansion valve, the third expansion valve, and the third valve, the refrigerant flowing out from the second heat exchanger flows into the battery cooler in an expanded state via the sixth refrigerant branch pipeline; by the operation of the fourth valve, the cooling liquid flowing out from the electrical components flows into the radiator; by the operation of the first pump, the cooling liquid is circulated in the battery cooling liquid circuit; by the operation of the second pump, the cooling liquid is circulated in the electrical component cooling liquid circuit; circulating the refrigerant in the air conditioning device by operation of the compressor. In the third mode when the thermal load is high, 9. The heat pump system of a vehicle according to claim 4, characterized by, by operation of the first expansion valve, the first valve, and the second valve, the refrigerant flowing out from the internal condenser flows into the first heat exchanger in a non-expanded state, and the refrigerant flowing out from the first heat exchanger flows into the second heat exchanger; by operation of the second expansion valve, the third expansion valve, and the third valve, a part of the refrigerant flowing out from the second heat exchanger flows into the battery cooler via the sixth refrigerant branch line in an expanded state, and the remaining part of the refrigerant flowing out from the second heat exchanger flows into the evaporator in an expanded state; by operation of the fourth valve, the coolant flowing out from the electrical components flows into the radiator; circulating the refrigerant in the air conditioning device by operation of the compressor. In the third mode when the thermal load is low, by operation of the first expansion valve, the first valve, and the second valve, the refrigerant flowing out from the internal condenser flows into the refrigerant line upstream of the second heat exchanger via the fourth refrigerant branch line and the second refrigerant branch line in a non-expanded state; by operation of the second expansion valve, the third expansion valve, and the third valve, a part of the refrigerant flowing out from the second heat exchanger flows into the battery cooler via the sixth refrigerant branch line in an expanded state, and the remaining part of the refrigerant flowing out from the second heat exchanger flows into the evaporator in an expanded state; 10. The heat pump system of a vehicle according to claim 4, characterized by, by operation of the fourth valve, the coolant flowing out from the electrical components flows into the radiator; circulating the refrigerant in the air conditioning device by operation of the compressor. In the fourth mode when the vehicle is running and the ambient temperature is low, by operation of the first expansion valve, the first valve, and the second valve, the refrigerant flowing out from the internal condenser flows into the first heat exchanger in an expanded state, and the refrigerant flowing out from the first heat exchanger flows into the first refrigerant branch line; by operation of the fourth valve, the coolant flowing out from the electrical components flows into the coolant bypass line; circulating the refrigerant in the air conditioning device by operation of the compressor. In the fourth mode when the vehicle is running and the ambient temperature is low, 11. The heat pump system of a vehicle according to claim 4, characterized by, by operation of the first expansion valve, the first valve, and the second valve, the refrigerant flowing out from the internal condenser flows into the first heat exchanger in an expanded state, and the refrigerant flowing out from the first heat exchanger flows into the first refrigerant branch line; by operation of the fourth valve, the coolant flowing out from the electrical components flows into the radiator bypass line; circulating the refrigerant in the air conditioning device by operation of the compressor. ​ ​ ​ 12. The heat pump system of a vehicle according to claim 4, characterized by, ​ ​ ​ The operation of the fourth valve causes the coolant flowing out from the electric component to flow into the coolant bypass line; The operation of the first pump causes the coolant to circulate in the battery coolant circuit; The operation of the second pump causes the coolant to circulate in the electric component coolant circuit; The operation of the fourth valve causes the coolant flowing out from the electric component to flow into the coolant bypass line; 13. The heat pump system of a vehicle according to claim 4, characterized by, The operation of the first pump causes the coolant to circulate in the battery coolant circuit; The operation of the second pump causes the coolant to circulate in the electric component coolant circuit; The operation of the fourth valve causes the coolant flowing out from the electric component to flow into the coolant bypass line. In the fourth mode when the vehicle is running and the ambient temperature is high, The operation of the first expansion valve, the first valve, and the second valve causes a part of the refrigerant flowing out from the internal condenser to flow into the first heat exchanger in an expanded state, and the refrigerant flowing out from the first heat exchanger to flow into the first refrigerant branch line, and the remaining part of the refrigerant flowing out from the internal condenser to flow into the refrigerant line upstream of the second heat exchanger via the fourth refrigerant branch line and the second refrigerant branch line in an expanded state; The operation of the second expansion valve, the third expansion valve, and the third valve causes the refrigerant flowing out from the first heat exchanger to flow into the fifth refrigerant branch line in its entirety, and to flow into the refrigerant line upstream of the compressor via the fifth refrigerant branch line; The operation of the fourth valve causes the coolant flowing out from the electric component to flow into the coolant bypass line; 14. The heat pump system of a vehicle according to claim 4, characterized by, The operation of the first pump causes the coolant to circulate in the battery coolant circuit; The operation of the second pump causes the coolant to circulate in the electric component coolant circuit; The operation of the fourth valve causes the coolant flowing out from the electric component to flow into the coolant bypass line. In the fifth mode when the vehicle is running and the ambient temperature is low, The operation of the first expansion valve, the first valve, and the second valve causes a part of the refrigerant flowing out from the internal condenser to flow into the first heat exchanger in an expanded state, and the refrigerant flowing out from the first heat exchanger to flow into the first refrigerant branch line, and the remaining part of the refrigerant flowing out from the internal condenser to flow into the refrigerant line upstream of the evaporator via the fourth refrigerant branch line and the third refrigerant branch line in an expanded state; The operation of the fourth valve causes the coolant flowing out from the electric component to flow into the coolant bypass line; 15. The heat pump system of a vehicle according to claim 4, characterized by, The operation of the first pump causes the coolant to circulate in the battery coolant circuit; The operation of the second pump causes the coolant to circulate in the electric component coolant circuit; The operation of the fourth valve causes the coolant flowing out from the electric component to flow into the coolant bypass line. In the fifth mode when the vehicle is idling and the ambient temperature is high, The operation of the first expansion valve, the first valve, and the second valve causes a part of the refrigerant flowing out from the internal condenser to flow into the first heat exchanger in an expanded state, and the refrigerant flowing out from the first heat exchanger to flow into the second heat exchanger, and the remaining part of the refrigerant flowing out from the internal condenser to flow into the refrigerant line upstream of the evaporator via the fourth refrigerant branch line and the third refrigerant branch line in an expanded state; The operation of the second expansion valve, the third expansion valve, and the third valve causes the refrigerant flowing out from the second heat exchanger to flow into the fifth refrigerant branch line in its entirety, and to flow into the refrigerant line upstream of the compressor via the fifth refrigerant branch line; The operation of the fourth valve causes the coolant flowing out from the electric component to flow into the coolant bypass line; circulation of the coolant in the battery coolant circuit is performed by operation of the first pump; circulation of the coolant in the electrical component coolant circuit is performed by operation of the second pump; circulation of the refrigerant in the air conditioning device is performed by operation of the compressor.

16. The heat pump system of a vehicle according to claim 4, characterized by, In the sixth mode, by operation of the first expansion valve, the first valve, and the second valve, a portion of the refrigerant flowing out from the internal condenser flows into the first heat exchanger in an expanded state, and the refrigerant flowing out from the first heat exchanger flows into the first refrigerant branch line, and the remaining portion of the refrigerant flowing out from the internal condenser flows into the refrigerant line upstream of the second heat exchanger via the fourth refrigerant branch line and the second refrigerant branch line in an expanded state; by operation of the second expansion valve, the third expansion valve, and the third valve, the refrigerant flowing out from the second heat exchanger all flows into the fifth refrigerant branch line, and the refrigerant flowing into the fifth refrigerant branch line flows into the battery cooler via the sixth refrigerant branch line in a non-expanded state; by operation of the fourth valve, the coolant flowing out from the electrical component flows into the coolant bypass line; circulation of the coolant in the battery coolant circuit is performed by operation of the first pump; circulation of the coolant in the electrical component coolant circuit is performed by operation of the second pump; circulation of the refrigerant in the air conditioning device is performed by operation of the compressor.

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